I don’t have an example of the thinner Leo era JM pickup but here are three versions of the alnico pole type. On the left is I think the 62 RI, next is the taller MIJ, and last is the VMod, followed by an actual Strat pickup for comparison. None of the current Fender JM pickups are just Strat pickups in a wider housing, though they say that often over at TGP. The two US versions pictured read over 8k resistance and are quite fat toned, but the V Mod has more cutting tone and also seems to have a wider dynamic response to pick attack. It goes just as dark and fat if you pick carefully further from the bridge, but it can get brighter quite easily even into ice pick tone.